Chemical responsible for the dead of 4,000 Sea Birds

By Curious

2 incidents off the UK coast led to the dead of 4,000 sea birds. Wildlife conservation charities are concerned and want the chemical (Polyisobutene) PIB hazard classification status to be reviewed.
Uses of the chemical: Fuel and lubricant additive, Explosives, Sporting equipment, Gas masks and chemical agent protection, Chewing gum, Tires and more.
It is known that the chemical is not directly toxic to sea birds but the polyisobutene becomes sticky when is in contact with water.
The plumage of sea birds is affected and the birds have difficulties with their movement and feeding.
The law allows now small quantities to be discharged in certain conditions. The threat on marine eco-systems has not to be underestimated.